Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues	$ 55,397	$ 44,780	$ 171,831	$ 140,516
Cost of sales:
Cost of sales	39,225	29,812	123,576	96,347
Amortization of purchased technology	1,926	1,961	5,780	5,935
Total cost of sales	41,151	31,773	129,356	102,282
Gross margin	14,246	13,007	42,475	38,234
Research and development	6,093	6,054	18,044	19,618
Selling, general and administrative	8,321	7,561	24,514	22,536
Intangible asset amortization	1,260	1,260	3,780	3,780
Restructuring and acquisition-related charges, net	655	148	1,602	4,842
Income (loss) from operations	(2,083)	(2,016)	(5,465)	(12,542)
Interest expense	(116)	(97)	(392)	(417)
Other income (expense), net	255	568	1,463	1,126
Income (loss) before income tax expense (benefit)	(1,944)	(1,545)	(4,394)	(11,833)
Income tax expense (benefit)	694	521	1,800	1,405
Net income (loss)	$ (2,638)	$ (2,066)	$ (6,194)	$ (13,238)
Net income (loss) per share:
Basic (in dollars per share)	$ (0.07)	$ (0.06)	$ (0.17)	$ (0.36)
Diluted (in dollars per share)	$ (0.07)	$ (0.06)	$ (0.17)	$ (0.36)
Weighted average shares outstanding:
Basic (in shares)	38,056	36,830	37,402	36,740
Diluted (in shares)	38,056	36,830	37,402	36,740